Electron-discharge device



Nov. 10,1925.

. P. SCHWERIN ELECTRON DISCHARGE DEVICE Filed May 22, 1923 I Patented Nov. 10, 1.925.

UNITED STATES 1,560,737 PATENT oFFlcE.

PAUL SCHWERIN', 0F NEW YORK, N. Y., ASSIGNOB. T0 WESTERN ELECTRIC COMPANY INCORPORATED, 0F NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

ELECTBON-DISCHABGE DEVICE.

Appucamn mea my 2s, 192s. serial m. 640,660.

To all whom t may concern:

Be it known that I, PAUL SCHWERIN, a citizen of the United States, residing at New York, in the county of Bronx, State of New York, have invented certain new and useful Improvements in Electron-Discharge Devices, of which the following is a full, clear, concise, and exact description.

This invention relates to electron discharge devices and pertains more especially to an improved support for the cathodes thereof.

The object of this invention is to maintain uniform the space relation between the cathode and other electrodes of an electron discharge device despite the expansion of the cathode .during the operation of the device.

This object is attained by maintaining the cathode strands under uniform tension through the medium of resilient filament supports. In an insulating member is arranged an eyelet from one end of which projects a guide. Through the guide is passed a filament supporting hook, the end of which is attached to a resilient member supported from said eyelet. The tension of the resilient member serves to take up any expansion in the filament thereby maintaining constant the space relation between the filament andthe other electrodes. l

, Referring now to the drawings, Fig. 1 is an elevation partially broken away of a vacuum tube embodying the invention. Fig. 2 is an enlarged detail view of one form of suspension device and Fig. 3 is an enlarged view of another form of suspension device.

An enclosing vessel 10 is provided with a re-entrant stem 11 on which is arranged a collar 12 having arms 13 extending therefrom into the interior of the vessel. The arms 13 support a fiattened cylindrical electrode 14 to which are welded the rods 15. Carried by the ends of the rods 15 are the blocks 16 and 17 of insulating material between which is supported the grid electrode 18. Extending from the block 17 toward the block 16 are hooks 19 which are rigidly mounted in the block. In the block 16 are provided apertures in which are arranged eyelets 20, the ends of which are clamped against the surfaces of the block to fasten the eyelet in position. A wire 21 is welded to the eyelet 20 and has one arm projecting toward the block 17, this end being bent at right angles at 22 and provided with an aperture. The other arm 23 of the rod 21 1s bent out of alignment with the major p01'- tion thereof and its end is bent at right angles across the axis of the eyelet. A helical sprlng 24 has one end attached to the end of the arm 23 and is provided with a hook portion 25 extending through the apertured arm 22, said hook portion receiving the cathode 26, the other portions of which are strung over the hooks 19. The cathode 1s maintained under tension by the resiliency of the springs 24 thus maintaining uniform the' spaced relation between it and other' electrods.

Referring now to the modification disclosed in Fig. 3, a rod 27 is welded to the eyelet 20 and its end is bent at right angles to the main portion and provided with an aperture. A helical spring 28 is supported above the eyelet 20 by having one end thereof welded to the eyelet 20. A rod 29 extends across the free end of the helical spring 28 and is welded thereto. A filament supporting hook 30 passes through the aperture in the rod 27 and is welded to the rod 29. The cathode 26 is passed over the hook of the filament supporting member 30 and is maintained under tension by the resiliency of the springs 28. With this arrangement the filament supporting hook ma be made of any desired diameter indepen ent of the size of the wire of the helix 28.

What is claimed is:

1. In an electron discharge device, a block of insulating material, a tubular member carried thereby, a filament supporting member passing through said member, a guide for said member carried by said eyelet, and means supported from said eyelet for maintaining said filament supporting member under tension.

2. In an electron discharge device, a block of insulating material, an eyelet carried thereby, a'rod carried by said eyelet and projecting in both directions therefrom, a filament supporting member, means supported by one end of said rod for maintaining said filament supporting member under tension, and guiding means for said su poting member on the other end of said ro 3. In an electron discharge device, a block of insulating material, an eyelet carried thereby, a filament supporting member passing through said eyelet, a resilient support for said su porting member, and .means carried by sai eyelet for guidmg sald supporting member.

4. An electron discharge device, a block of insulatin material, an eyelet mounted therein, a ro carried by said eyelet and projecting beyond both ends thereof, a wireV helix supported from one end of said rod and having its free end projectin through an aperture in the opposite end o said rod,`

vand a cathode supported from said last named end.

5. In an electron discharge device, a block of insulating material having an a erture, a filament hook passing therethroug a resilientl supporting member for said hook arranged at one side of said insulating block, and a guide member for said'hook on the other side of said block.

6. In an electron discharge device, a block of insulating material, a metallic eyelet mounted therein, a hook having its shank passing therethrough, a resilient supporting member for said hook supported from said eyelet, a guide for said hook carried by laidkeyelet, and a lament supported by said 7. In an electron discharge device, a block of insulating material, an eyelet mounted therein, an apertured metallic member attached to said eyelet, a wire helix supported Laconia? .of insulating material, an eyelet mounted therein having lianges clamped against the surfaces of said block, a resilient kmember supported by said eyelet, a suspension member carried by said resilient member, and

-a guide for said suspension member.

l0. In an electron discharge device, a block of insulating material, an eyelet mounted therein, an apertured guide member project- 1n beyond one end of said eyelet, a wire helix supported from said eyelet oppositel to said guide member and a suspension member passing through said apertured guide member and supported by said helix.

In witness whereof, I hereunto subscribe my name this 18th day'of May A. D., 1923.

PAUL SCHWERIN 

